It's mentioned along with some sales info in one of their reports- it's in german though which makes it rather difficult for me to find a primary source even using google.de/ncr. It is mentioned fairly widely though, Gorath mentions it here wrt them funding G4/Arcania for example.

Originally Posted by Harlequin
As they nor any publisher they are working with holds the D&D lic.

We don't know that for sure. We simply don't know the status of any unannounced D&D licence(s) nor which other publishers apart from THQ Obsidian is working with, except that Hasbro would like to use the licence and Obsidian should be a good fit.

Basically there's no reason more or less to think Obsidian is working on IWD3 than there was yesterday.